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Binary-search optimisations and fixes

--- a/src/Font.cpp

+++ b/src/Font.cpp

@@ -1073,20 +1073,12 @@

 	size_t left = 0;

 	size_t right = font->total_local_glyphs;

-	while (right - left >= 2)

+	for (;;)

 	{

-		size_t index = left + (right - left) / 2;

+		size_t index = (left + right) / 2;

-		if (font->local_glyphs[index].unicode_value < unicode_value)

+		if (font->local_glyphs[index].unicode_value == unicode_value)

 		{

-			left = index;

-		}

-		else if (font->local_glyphs[index].unicode_value > unicode_value)

-		{

-			right = index;

-		}

-		else

-		{

 			const Glyph *local_glyph = &font->local_glyphs[index];

 			glyph->unicode_value = local_glyph->unicode_value;

@@ -1104,6 +1096,14 @@

 			return glyph;

 		}

+

+		if (index == left)

+			break;

+

+		if (font->local_glyphs[index].unicode_value < unicode_value)

+			left = index;

+		else //if (font->local_glyphs[index].unicode_value > unicode_value)

+			right = index;

 	}

 #endif

-- 

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